This video will show the basics of working with text objects in AutoCAD. Please refer to Tutorial 2-6 for more information.
In a drawing, you need more than lines and circles to convey the information needed by the viewer. If you have a mechanical drawing, you might need to include some text about what material the object is made from. The uses for text are endless, but you need to know how to add text easily and make it clear and readable.
Have a look at some drawings online and see how much text is used.